http://gyazo.com/22b40c8dcdfb39b872a4d73b431ee35d There ya go buddy. Pretty much the simplest version of the zomboy sounding phaser basses. The phase knob you can turn and modulate to whatever you think sounds right, but I use something like phaser knob in the middle modulating to like 2 o'clock via the lfo 5 I used
Then apply your own kind of distortions such as camelcrusher/camelphat etc and eq'ing and such to transform it into your own kind of sound to suit your mix and style
As for the panda eye's kind of sounds. I'm pretty sure that he uses harmour to achieve the phaser-y kind of synths for example in his Snake Bite Soundcloud
Seamless did a great tutorial on those kind of basses in his Omegamode tutorial
That bass is VERY similar to this with some minor changes to the phase knob and detune automation in harmor. I'd personally recommend using "Deep" or "Deeper" for your type of phasing and at a speed of 10. Make the mix about 10-20% and try and get that phasing sound by messing with the Width and OFS and see how that goes Seamless' patch is a great starting point for the panda eyes kind of sounds
And finally for the must die sounds. They are very similar to the zomboy sounding ones. Here's a patch to look at: http://gyazo.com/6bea921d18efe26a263deb1b6f4835eb and here's a tutorial that is good for the must die sounding basses.